PendSV interrupt does not occur

[Myasu.1]

・environment

use board : STM32F1 Value Line Discovery Kit

use debugger : TrueStudio(v9.3.0)

​

・question

I would like to use PendSV interrupt.

To do so, I have executed the code below, but the interrupt does not occur.

SCB->ICSR |= SCB_ICSR_PENDSVSET_Msk;

※SCB_ICSR_PENDSVSET_Msk is (​1UL << 28)

​

The SCB when the following code is executed is shown below.

​In the initialization, the interrupt handler is set to the vector table. No other special processing is done.

Is there something missing in the procedure?

[Myasu.1]

sorry, this problem is soleved.

the above code is executed in SVC interrupt.

SVC interrupt is done , then PendSV interrupt occures.